LEAP_FROG_FILTER_FIRST_STRATEGY

A filter strategy that uses a "leap-frog" approach (also called "zig-zag join").
The scorer and the filter
take turns trying to advance to each other's next matching document, often
jumping past the target document. When both land on the same document, it's
collected.

Note: This strategy uses the filter to lead the iteration.

LEAP_FROG_QUERY_FIRST_STRATEGY

A filter strategy that uses a "leap-frog" approach (also called "zig-zag join").
The scorer and the filter
take turns trying to advance to each other's next matching document, often
jumping past the target document. When both land on the same document, it's
collected.